South African doctors are tough. We are used to extreme conditions. Making do with little. Going the extra mile for our patients. We have faced surge after surge of trauma patients hit our depts every weekend, managing the wounded, bleeding, critically injured. A thread 1/

I trained in the early 2000s. When SA didn't have ARVs for patients dying with HIV/Aids. In 2003 as a med student we marched so that South Africans could have access to ARVS. Millions of South Africans died due to the slow rollout of ARVS in the early 2000s 2/
As an intern, as ARVs were just being initiated, countless patients died - too sick to be started on ART, it was too late. As an intern at Bara, I remember certifying 8 patients dead in a night. Some patients were my own age - 24. 3/
ARVs made a huge difference. Life expectancy increased. Child-headed households decreased. More patients living a normal life. The #Covid19SA pandemic has reminded me so much of that pre-ARV era - the helplessness, being overwhelmed with patients and lacking resources 4/
Although we always get nervous when being exposed to HIV, we feel reassured that there ART prophylaxis. With #COVID19 HCWs are at high risk of getting sick, and also severe illness. We have continued to face this fear all year 5/
We have continued to work in an overburdened healthcare system, doing our best. Yet not even the PPE we are given has been of an acceptable standard. This article looked at N95s given to SA HCWs and found them SUBSTANDARD. 6/ https://t.co/Gg4KBK0pXK
Aerosolisation of #COVID19 has been proven to be a major concern. We don't have negative pressure rooms. We work in poorly ventilated departments overcrowded with patients. We are at high risk of getting sick with covid-19. Yet we don't have masks that fit properly 7/
Given our working environment, our poorly fitting masks, our second wave that is surging beyond the peak of the 1st wave, the need to reopen the economy to tourists, South Africa needs to make getting the #covid19vaccine its UTMOST PRIORITY. 8/
South African Healthcare Workers MUST hold @HealthZA accountable. We need the vaccine NOW, as we face our second wave. Getting the vaccine mid-year is TOO LATE for us and our patients. 9/
Let's not forget how long it took to get anti-retrovirals to patients with HIV/AIDS in South Africa. I will never forget what we went through back then. Delaying the covid19 vaccine is the same thing. 10/10 end

More from Health

I think @SamAdlerBell in his quest to be the contrarian on Fauci gets several things wrong here. 1/


First, the failure last year actually was driven by the White House, the #Trump inner circle. Watch what's happening now, the US' scientific and public health infrastructure is creaking back to life. 2/

I think Sam underestimates the decimation of many of our health agencies over the past four years and the establishment of ideological control over them during the pandemic. 3/

I also am puzzled why Tony gets the blame for not speaking up, etc. Robert Redfield, Brett Giroir, Deb Birx, Jerome Adams, Alex Azar all could have done the same. 4/

Several of these people Bob Redfield, Brett Giroir, Alex Azar were led by craven ambition, Jerome Adams by cowardice, but I do think Deb Birx and Tony tried as institutionalists, insiders to make a difference. 5/
No-regret #hydrogen:
Charting early steps for H₂ infrastructure in Europe.

👉Summary of conclusions of a new study by @AgoraEW @AFRY_global @Ma_Deutsch @gnievchenko (1/17)
https://t.co/YA50FA57Em


The idea behind this study is that future hydrogen demand is highly uncertain and we don’t want to spend tens of billions of euros to repurpose a network which won’t be needed. For instance, hydrogen in ground transport is a hotly debated topic
https://t.co/RlnqDYVzpr (2/17)

Similar things can be said about heat. 40% of today’s industrial natural gas use in the EU goes to heat below 100°C and therefore is within range of electric heat pumps – whose performance factors far exceed 100%. (3/17)


Even for higher temperatures, a range of power-to-heat (PtH) options can be more energy-efficient than hydrogen and should be considered first. Available PtH technologies can cover all temperature levels needed in industrial production (e.g. electric arc furnace: 3500°C). (4/17)


In our view, hydrogen use for feedstock and chemical reactions is the only inescapable source of industrial hydrogen demand in Europe that does not lend itself to electrification. Examples include ammonia, steel, and petrochemical industries. (5/17)

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A brief analysis and comparison of the CSS for Twitter's PWA vs Twitter's legacy desktop website. The difference is dramatic and I'll touch on some reasons why.

Legacy site *downloads* ~630 KB CSS per theme and writing direction.

6,769 rules
9,252 selectors
16.7k declarations
3,370 unique declarations
44 media queries
36 unique colors
50 unique background colors
46 unique font sizes
39 unique z-indices

https://t.co/qyl4Bt1i5x


PWA *incrementally generates* ~30 KB CSS that handles all themes and writing directions.

735 rules
740 selectors
757 declarations
730 unique declarations
0 media queries
11 unique colors
32 unique background colors
15 unique font sizes
7 unique z-indices

https://t.co/w7oNG5KUkJ


The legacy site's CSS is what happens when hundreds of people directly write CSS over many years. Specificity wars, redundancy, a house of cards that can't be fixed. The result is extremely inefficient and error-prone styling that punishes users and developers.

The PWA's CSS is generated on-demand by a JS framework that manages styles and outputs "atomic CSS". The framework can enforce strict constraints and perform optimisations, which is why the CSS is so much smaller and safer. Style conflicts and unbounded CSS growth are avoided.